多重化双向DC/DC变换器电流增广控制研究  

AUGMENTED CURRENT CONTROL STRATEGY FOR MULTI-CHANNEL INTERLEAVING BIDIRECTIONAL DC/DC POWER CONVERTER

作　　者：马速良[1] 武建文[1] 黄炼[1] 陈明轩[1] Ma Suliang, Wu Jianwen, Huang Lian, Chen Mingxuan(School of Automation Science and Electrical Engineering, Beihang University, Beijing 100083, China)

机构地区：[1]北京航空航天大学自动化科学与电气工程学院

出　　处：《太阳能学报》2018年第9期2607-2616,共10页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51377007);高等学校博士学科点专项科研基金(20131102130006)

摘　　要：针对光储分布式发电系统中多重化双向DC／DC变换器结构，提出一种基于输入-输出线性化的增广电流控制方法。首先建立双向DC／DC变换器仿射非线性模型并分析其内动态方程，确定以电感电流为输出的状态空间描述；然后利用非线性变换将输入-输出线性化并引入增广电流反馈机制，根据二阶经典控制系统，设计控制器参数。最后经数字仿真验证该文提出的控制方法可准确、快速、强鲁棒性地跟踪功率指令，消除稳态误差对电网和负荷的不良影响，多重化结构与错相调制有效减小电感电流以及储能充放电电流纹波。Aiming at the multiple bi-directional DC/DC converter topological structure of distributed PV-energy storage generation system, a control strategy is proposed based on input-output linearization of augmented current. The affine nonlinear mathematical model of hi-directional DC/DC converter and internal dynamic equation is established and analyzed, respectively. Inductor current is determined as the output of the state space description. And then, the input- output is linearized by nonlinear transformation based on augmented current feedback principle. The second-order classic control system equation of input-output is established to design the controller. It has been verified by digital simulation that the proposed control method can accurately , rapidly and robustly track power reference, eliminate the steady-state error for grid or load. And multiple structure and phase stagger modulation can reduce the inductor current and current ripple of each phase effectively.

关 键 词：分布式发电系统 储能系统 双向DC/DC变换器 多重化技术 非线性控制 增广输出反馈 

分 类 号：TM614[电气工程—电力系统及自动化] TM615